Air-heating furnace



Dec. 6, 1927- L. BURMESTER ET AL 1651668 AIR HEATING FURNAGE Filed` June ll. 1927 2 Sheets-Sheet l L BURMESTER 37915. @l A'. MuNRoi-l.

Dec. 6, 1927. 1,651,668

L. 4BURIVIESTER ET AL.

AIR HEATING FURNACE Filed June 1l, 1927 2 Sheets-Sheet Q A. MUNHOL.

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upon eachother and be thereby spread to form flattened flame-zones. At approximately the middle of the burner is disposed a pilot light 21, which is supplied with fuel y doors and screened opening, and the'pipes 19 y and 22 passing through the screened openingl to enter the lower portion ofthe shell, as shown.

the fuel is admitted through the screen 2t, passing therefrom directly to the front port-ion of the burner, and for the rear portion of the burner the air passing through a conduitforrned by an` angle-plate 31 disposed in the lower corner portion of the shell 14,

the front end of said conduit being open to` receive airA at the screen 29 Vand the rear portionof the plate l'having perforations 32 for allowing the air from the conduit to pass up to the burner. Directly adjacent to the rearward end of the burner and anglepla-te 31, a Vertical battle-plate 33 is disposed transversely of the shell. Said plate 323 is longitudinally intermediate two series of the tlues 17 and extends from the lower corner of the shellup to the centers of the lowermost flues of the series, the inclined upper edges a of the plate being parallel with the centers of said llues,as shown by the dotted lines in Fig. 1. Between the two series of flues 17 next rearward from the baille-plate 38, a battle-plate 34 is extended transversely across the upper 'portion of 'the shell, lea-vingl a triangular opening below the lower edge of said plate, which is horizontal as indicated by the dotted line in Fig. 1. Between the next two series of the flues 17 y-is disposed a bao-plate 35 similar to the plate 88, and, if the length of the sheil should be increased to. accommodate additional 'series of the flues, additional bathe-plates should. be enlployed, similar to the plates 33 and 3i, and cisposed alternately between the successive series of the flues. To the rear end of the shell 14 adjacent to the lower corner thereof is connectedv the stack or chimney-pine 36,

which is extended through-the rear end of the housing 10, as shown. vAn angle-plate 37 is extended longitudinally from the front Vend of the shell 14y to the balile-plate`33; said platel being arranged above the, burner, slightly spaced from the lowermost of the flues 17, and being of substantially the proportions shown in Fig. 1.7 Said plate 37 serves as a battle to spread laterally the hot combustion products rising from the Air for supporting combustion of burner, preventing excessive heating of the portions of the flucs directly vabove the burner, and causing the lgases to pass about the lower portions of the flues before flowing upward longitudinally thereof to the upper portion of the shell. rI'he transverse baiiie- .plates 33, 34 and 35 cause respectively upwithin vthe housing 10.

In the front yof the upper portion 11 of the housing a triangular frame 88 is `disposed about a similarly shaped opening, and through said openingvextends a V-shaped water-trough or pan 39. The rear end ofsaid pan is supported by a forked leg ll() which rests upon the upper corner of the shell 14. A short portion of the water-pan projects forwardly from the frame 88, and the tcp of said projecting portion of the pan is normally covered by a plate or door 4l Awhich is hinged to the-frame 38 soas to'be readily openable for filling` the pan with water. By the arrangement of the waterpan in the heated upper port-ion of the housing, evaporation therefrom is caused at a rate suliicient- Vto properly humidity the heated air delivered to the distributingpipes. Y

It will be seen that by the described construction' we provide a furnace constructed substantially throughout from sheet-metal, which may be inexpensively fabricated in sheet-metal shops by the use of the ordinary tools andappliances used for such work. lt will be seen also that the casing or shell 14tinay be of such proportions that it may be taken through the doors of an ordina-ry llower to the upper portions of the space dwelling, and that increase in theV heating capacityA of the furnace may be effected-by incr the*r length of the shell and the number of series offlues traversinfg the same, i

without increasing the transverse dimensions` of the shell. It will be seen also that by the use of theI thin-walled ilues a l maximum transfer of heat may be effected from the combustion products to the airA circulating through the furn'ace-l'xousing, and that variations of the fuel-supply will promptly cause a responsive variation of the heat supplied by the furnace to the distributing-pipes, whereby the furnace is especially well adapted for automatic thermostatic control by devices governing the fuel-supply thereto. The inclined arrangement of the flues 17, opening into the lower portions of the housed space and extrniding diagonally upward into the transverse baffle-plates cause` an efficient circulation of the combustion products in the portion of the furnace-body.rearward of the burner, and the horizontal baffle or angleplate 3T insures efficient distribution of the circulation of hot gases about the tlues positioned above the burner, while enabling the burner to be placed directly within the shell instead of being in a separate combustionchamber.

Now, having described our invention, what we claim and desire to secure by Letters Patent is:

, l. In an air-heating furnace, a furnacebody comprising a parallelepipedal shell disposed cornerwise vertically, flues traversing the intermediate and upper portions of said shell between the opposite inclined sides thereof, said flues being in superposed series and the alternate series being oppositely inclined, and heating means arranged within the lower longitudinal portion of said shell.

2. ln an air-heating furnace, a furnacehody comprising a rectangular sheet metal shell disposed cornerwisle vertically, sheetmetal fines traversing the upper and intermediate portions of said shell between the opposite inclined sides thereof, said flues loeing arranged in superposed series alternately oppositely inclined, and 'heating means extending lon g;itudinally7 of the shell within the lower corner portionA thereof.

3. ln an air-heating furnace, a furnacebody comprising a right parallelepipedal shell of sheet metal, means for supporting the same in cornerwise vertical position,

'sheet-metal fines traversing the intermediate and upper portions of said shell between the opposite inclined sides thereof, said flues being arranged in superposed series and the alternate series being oppositely inclined, heating means extending longitudinally within the lower front portion of the shell, and vertical battle-plates interposed between the series of fines rearwardly of the heating means and arranged to ,direct combustion products from the heating means alternately upward and downward during the fiow thereof toward the rear end of the shell.

4. A structure as set forth in clai1n8,including a baffle-plate disposed horizontally above the heating ineansand adapted to directV `the combustion products laterally about the lower portions of the lues which extend aboveV the heating means.'

5. In 'an air-heating furnace, a furnacebody comprising a sheet-metal shell having a. plurality of series of inclined superpo'sed air-fluestraversing the upper portions thereof, the successive series of flues being oppositely inclined,fa gas burner extending longitudinally within the lower portion of said shell, the latter having an opening at the end for. admitting air to support combustion of the fuel, and means forming a` conduit receiving air from said opening and adapted to deliver the air therefrom to the portions of the burner remote from said opening. y f

6. In a structure as set forth in' claim 5, a horizontal baffle-plate arranged above the burner and adapted to vdeflect the combustion products therefrom laterally about the lower portions of the adjacentair-iiues.

7. In an air-heating furnace, a furnacebody comprising a right parallelepipedal shell of sheet-metal disposed cornerwise vertically, a housing inclosing said furnacebody and having air inlet and distributing pipes connected therewith respectively at the lower and upper portions thereof, sheet-metal air-fines traversing the upperportion of said shell between the opposite lower and upper inclined-.sidesthereof, and heating means disposed within said` shell adjacent to the lower corner portion thereof,

8. A structure as set forth in claim 7, lin i which the air-fines are arranged in a plu-l rality of superposed series, the successive series being oppositely inclined, and transl,

Louis BUnMnsTnn. l ALEXANDER Monson. 

